Awakening Shakoki Dogu

Legend of the Five Rings card from Honor Bound

Card Type: Strategy
Gold Cost: 0
Keywords: Terrain
Card Text: Before this battle's resolution: Each player (starting with the active player) may target any number of his units at the current battlefield and move them home; if they moved, bow them, then give -2C to each Personality remaining at the battlefield and dishonor him.
Battle: If there are no Terrains at the current battlefield: Put this card into play there.
Focus Value: 1
Legality: Hidden Emperor (Jade)
Deck: Fate

Printings

Rarity: Common
Flavor Text: The spirit of the forest sleeps within its white birch trees, but one day the horrifying power there may awaken. Villagers can only pray, and hope that it will find the shrine and be merciful.
Artist: Diana Vick
Publisher: Wizards of the Coast

Erratum: Should read, "All units at this battle may return to their fiefs..." [Erratum] Rules Archive, August 18, 2007, p. 7
Targets the units that stay and leave. A Test of Courage can cancel the terrain's effects when it resolves. [15 July 1999] Rules Archive, August 18, 2007, p. 7
The active player is the first one who has to decide which of his units leave the battle. He makes all his decisions at this time. Then the choice goes around the table, once, in turn order. [l5rinfo, 7/15/99] Accumulated Rulings, February 8, 2000, p. 16
Erratum: The first sentence should read, "All units at this battle may return to their fiefs, bowed." Text Change & Errata List, February 15, 2000, p. 2

Q: Okay, here's the deal:
We're in a battle, and I play the terrain "Awakening Shakoki Dogu", which reads:
"All units at this battle return to their fiefs, bowed. All remaining units lose -2 Chi until the end of turn and are dishonored."
My question: What remaining units?
A: Check the errata at http://l5r.alderac.com/rulings/ . The first sentence of this card should read, "All units at this battle MAY return to their fiefs, bowed." [emphasis added] Jeff Alexander, "post for 15 January 2003", 16 Jan 2003